How to make in CSS an overlay over an image?

All we need is an easy explanation of the problem, so here it is.

I am trying to achieve something like this:

this effect

When I hover over an image, I would like to put on that image this dark color with some text and the icon.

I am stuck here. I found some tutorials but they didn’t work out for this case.
Also, another issue — every image has a different height. The width is always the same.

How can this effect be achieved?

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

You can achieve this with this simple CSS/HTML:

.image-container {
    position: relative;
    width: 200px;
    height: 300px;
}
.image-container .after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    color: #FFF;
}
.image-container:hover .after {
    display: block;
    background: rgba(0, 0, 0, .6);
}

HTML

<div class="image-container">
    <img src="https://lorempixel.com/300/200" />
    <div class="after">This is some content</div>
</div>

Demo: http://jsfiddle.net/6Mt3Q/


UPD: Here is one nice final demo with some extra stylings.

.image-container {
    position: relative;
    display: inline-block;
}
.image-container img {display: block;}
.image-container .after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    color: #FFF;
}
.image-container:hover .after {
    display: block;
    background: rgba(0, 0, 0, .6);
}
.image-container .after .content {
    position: absolute;
    bottom: 0;
    font-family: Arial;
    text-align: center;
    width: 100%;
    box-sizing: border-box;
    padding: 5px;
}
.image-container .after .zoom {
    color: #DDD;
    font-size: 48px;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -30px 0 0 -19px;
    height: 50px;
    width: 45px;
    cursor: pointer;
}
.image-container .after .zoom:hover {
    color: #FFF;
}
<link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.min.css" rel="nofollow noreferrer noopener" rel="stylesheet"/>

<div class="image-container">
    <img src="https://lorempixel.com/300/180" />
    <div class="after">
        <span class="content">This is some content. It can be long and span several lines.</span>
        <span class="zoom">
            <i class="fa fa-search"></i>
        </span>
    </div>
</div>

Method 2

You could use a pseudo element for this, and have your image on a hover:

.image {
  position: relative;
  height: 300px;
  width: 300px;
  background: url(https://lorempixel.com/300/300);
}
.image:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  transition: all 0.8s;
  opacity: 0;
  background: url(https://lorempixel.com/300/200);
  background-size: 100% 100%;
}
.image:hover:before {
  opacity: 0.8;
}
<div class="image"></div>

Method 3

Putting this answer here as it is the top result in Google.

If you want a quick and simple way:

    filter: brightness(0.2);

*Not compatible with IE

Method 4

A bit late for this, but this thread comes up in Google as a top result when searching for an overlay method.

You could simply use a background-blend-mode

.foo {
    background-image: url(images/image1.png), url(images/image2.png);
    background-color: violet;
    background-blend-mode: screen multiply;
}

What this does is it takes the second image, and it blends it with the background colour by using the multiply blend mode, and then it blends the first image with the second image and the background colour by using the screen blend mode. There are 16 different blend modes that you could use to achieve any overlay.

multiply, screen, overlay, darken, lighten, color-dodge, color-burn, hard-light, soft-light, difference, exclusion, hue, saturation, color and luminosity.

Method 5

.bg-img{
  text-align: center;
  padding: 130px 0px;
  width: 100% !important;
  background-size: cover !important;
  background-repeat: no-repeat !important;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.86), rgba(0, 0, 0, 0.86)), url(your-img-path);
}

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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